Nano horn carrier and method of manufacturing the carrier

ABSTRACT

A nano horn carrier capable of effectively and conveniently utilizing the tip shape of a carbon nano horn and a method of manufacturing the carrier, the carrier wherein carbon nano horn aggregates ( 1 ) are dispersed in dispersion liquid, the dispersion liquid is fed onto a base material ( 3 ) and only the dispersion liquid is removed to dispose the carbon nano horn aggregates ( 1 ) thereon and a part of all of the carbon nano horn aggregates ( 1 ) are covered by fixing material ( 2 ) to carry on the fixing material ( 2 ), whereby the part or all of the carbon nano horn aggregates ( 1 ) can be carried on the fixing material ( 2 ).

TECHNICAL FIELD

The present invention relates to a nano horn carrier, and itsmanufacturing method. More particularly, the invention relates to a nanohorn carrier capable of utilizing the tip shape of carbon nano horn moreeffectively and conveniently, and a method of manufacturing the same.

BACKGROUND ART

A carbon nano horn discovered by the present inventors is characterizedby a pointed horn shape of tip of carbon nano tube, and is composed ofcarbon atom planes of mainly graphite structure, same as carbon nanotube. The carbon nano horn is generally manufactured as dahlia-shapedcarbon nano horn aggregates gathering multiple carbon nano horns in aspherical form of about 80 to 100 nm in diameter with the horn tip shapeset outside. Aside from dahlia-shaped carbon nano horn aggregates,bud-shaped carbon nano horn aggregates are also known, which have asmooth surface, not having pointed protrusions on the surface, and areexpressed as buds as compared with flowers of dahlia. Bud-shaped carbonnano horn aggregates are present in a spherical form gathering multipletubular carbon nano horns which are about 0.3 nm to 3 nm in diameter andseveral nm to 50 nm in length.

These carbon nano horn aggregates are very wide in surface area, and amass quantity can be synthesized at high purity, and they are expectedto be used as lightweight and inexpensive adsorption materials. On theother hand, by making use of the sharp and pointed tip shape of carbonnano horns with the tip angle of about 20 degrees, it has been attemptedto be used in, for example, electron emission element of electric fieldfor thin display device, and a high possibility is recognized inapplication by making use of the tip shape of carbon nano horns.

However, in the latter study of making use of tip shape of carbon nanohorns, basic studies about characteristics of material of carbon nanohorns are promoted, but nothing has been studied yet about practicaluse. That is, for example, although it has been disclosed by the presentinventors that carbon nano horns show electric field electron emissioncharacteristics by making use of the characteristic tip shape, nothinghas been studied further about installation and control of carbon nanohorns in actual use as devices.

The present invention is devised in the light of the above background,and it is hence an object thereof to solve the problems of the priorart, and present a nano horn carrier capable of utilizing the tip shapeof carbon nano horn more effectively and conveniently, and a method ofmanufacturing the same.

DISCLOSURE OF INVENTION

To solve the problems of the prior art, the invention presents asfollows.

It is a first aspect of the invention to provide a nano horn carrier,wherein two or more carbon nano horn aggregates are bonded and mutuallycarried, it is a second aspect to provide a nano horn carrier, wherein apart or all of carried carbon nano horn aggregates are fixed on a basematerial, it is a third aspect to provide a nano horn carrier in whichcarbon nano horn aggregates are fixed on a base material by a fixingmaterial, it is a fourth aspect to provide a nano horn carrier in whichthe base material has an arbitrary shape, it is a fifth aspect toprovide a nano horn carrier in which the base material is any one ofglass, ceramics, metal, alloy, semiconductor, and organic matter, it isa sixth aspect to provide a nano horn carrier in which the shape isvariable, and it is a seventh aspect to provide a nano horn carrier inwhich the tip of carbon nano horn is projecting from the surface of thefixing material.

It is an eighth aspect of the invention to provide a manufacturingmethod of nano horn carrier characterized by dispersing carbon nano hornaggregates in a dispersion liquid, supplying this dispersion liquid on abase material, removing only the dispersion liquid to dispose carbonnano horn aggregates, and covering a part or all of the carbon nano hornaggregates with a fixing member to carry on the fixing member, it is aninth aspect to provide a manufacturing method of nano horn carriercharacterized by dispersing carbon nano horn aggregates in a dispersionliquid, supplying this dispersion liquid on a base material in which afixing material layer is formed preliminarily, removing only thedispersion liquid to dispose carbon nano horn aggregates, and pressingthe carbon nano horn aggregates from above to the fixing materialsurface in a softened state layer to carry on the fixing member, and itis a tenth aspect to provide a manufacturing method of nano horn carriercharacterized by dispersing carbon nano horn aggregates in a dispersionliquid, supplying this dispersion liquid on a base material, removingonly the dispersion liquid to dispose carbon nano horn aggregates, andheating to 1200 to 2000° C. to bond mutually the carbon nano hornaggregates and carry on each other.

In addition, it is an eleventh aspect of the invention to provide amanufacturing method of nano horn carrier in which the base material hasan arbitrary shape, it is a twelfth aspect to provide a manufacturingmethod of nano horn carrier in which the base material is any one ofglass, ceramics, metal, alloy, semiconductor, and organic matter, it isa thirteenth aspect to provide a manufacturing method of nano horncarrier in which the base material is composed of a chemically orthermally unstable material, it is a fourteenth aspect to provide amanufacturing method of nano horn carrier in which the base material isremoved, it is a fifteenth aspect to provide a manufacturing method ofnano horn carrier in which the base material is removed by a solvent, itis a sixteenth aspect to provide a manufacturing method of nano horncarrier in which the base material is removed by heating, it is aseventeenth aspect to provide a manufacturing method of nano horncarrier in which the fixing material is any one of organic polymer,metal, alloy, and inorganic matter, it is an eighteenth aspect toprovide a manufacturing method of nano horn carrier in which the fixingmaterial is a material softened by heat of 1500° C. or less, it is anineteenth aspect to provide a manufacturing method of nano horn carrierin which the fixing material is a metal or alloy of which melting pointis 1500° C. or less, it is a twentieth aspect to provide a manufacturingmethod of nano horn carrier in which the fixing material is a materialforming a carbide at 1500° C. or less, it is a twenty-first aspect toprovide a manufacturing method of nano horn carrier in which a part ofthe fixing material covering the carbon nano horn aggregates isselectively removed, it is a twenty-second aspect to provide amanufacturing method of nano horn carrier in which the fixing materialis selectively removed by a solvent, it is a twenty-third aspect toprovide a manufacturing method of nano horn carrier in which the fixingmaterial is selectively removed by oxygen plasma etching, and it is atwenty-fourth aspect to provide a manufacturing method of nano horncarrier in which the fixing material is selectively removed by heatingin an oxygen atmosphere.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram showing an example of nano horn carrier of theinvention.

FIG. 2 is a diagram showing an example of nano horn carrier of theinvention.

FIG. 3 is a diagram showing an example of nano horn carrier of theinvention.

FIG. 4 is a diagram showing an example of observation result by atomicforce microscope (AFM) of surface of nano horn carrier manufactured inan example.

BEST MODE FOR CARRYING OUT THE INVENTION

The invention has the following features, and it is specificallydescribed below while referring to the exemplary examples.

Examples of nano horn carrier presented by the invention are shown inFIG. 1(a) to (f). It is a feature of a nano horn carrier of theinvention that a part or all of one or two or more carbon nano hornaggregates (1) are carried on a fixing material (2). In this nano horncarrier, carbon nano horn aggregates (1) may be either dahlia-shapedcarbon nano horn aggregates (1) gathering multiple carbon nano horns ina spherical form of about 80 to 100 nm in diameter with the horn tipshape set outside, or bud-shaped carbon nano horn aggregates (1) whichhave a smooth surface, not having pointed protrusions on the surface. Inthis nano horn carrier, carbon nano horn aggregates (1) may carry eitherone, for example, as shown in (a) or two or more as shown in (b) to (f).When two or more carbon nano horn aggregates (1) are carried in thisnano horn carrier, the carbon nano horn aggregates (1) may be disposedat arbitrary regular or irregular intervals, for example, as shown in(b), or may be disposed adjacently and densely, either regularly orirregularly as shown in (c). Further, in this nano horn carrier, onecarbon nano horn aggregate (1) may be disposed in the thicknessdirection, or two or more carbon nano horn aggregates (1) may bedisposed. That is, in the nano horn carrier of the invention, carbonnano horn aggregates (1) may be disposed so as to obtain the desiredcharacteristics or shape. In the nano horn carrier of the invention, asshown in (a) to (e), for example, all carbon nano horn aggregates (1)may be carried on the fixing material (2), or, as shown in (f), a partof gathering of carbon nano horn aggregates (1) may be carried on thefixing material (2).

In the invention, for example, the fixing member (2) may carry all ofcarbon nano horn aggregates (1) as shown in (a) to (c), or carry a partas shown in (d) to (f). The fixing material (2) is not specified inmaterial as far as it can be supplied in carbon nano horn aggregates (1)in specific configuration, and a part or all of carbon nano hornaggregates (1). Such fixing material (2) may include various organicpolymers, metal or alloy, and inorganic matter. Specifically, dependingon the purpose, usable examples include epoxy resin adhesive, rubberadhesive, polymethyl methacrylate (PMMA), polyethylene (PE), polyvinylchloride (PVC), and other polymers. Materials softened by heating at1500° C. or less may be also used, for example, specifically, indium,gallium, lead, gold and others metals and alloys of which melting pointis 1500° C. or less, and also silicon (Si), titanium (Ti) and othermaterials forming carbides at 1500° C. or less may be used.

The nano horn carrier of the invention may be composed of two or morecarbon nano horn aggregates (1) being bonded and carried on each otheras shown in FIG. 2, for example. The configuration of two or more carbonnano horn aggregates (1) is arbitrary as mentioned above.

A part or all of nano horn carrier of the invention may be fixed on abase material (3) as shown in FIG. 3(a) to (d), for example. For fixingon the base material (3), various materials may be used, and, forexample, the fixing material (2) may be also used.

In the invention, the base material (3) is not particularly specified inmaterial or shape, and glass, ceramics, metal, alloy, semiconductor,inorganic mater, or organic matter may be used. The shape is arbitrary,including plate, mesh, fiber, needle, sphere, or geometrical shape. Thesurface shape may be flat, undulated, curved, slit, etc.

The nano horn carrier of the invention may realize a specific shape byproperly selecting the materials of fixing material (2) and basematerial (3), or a nano horn carrier of variable shape may be alsoformed. More specifically, by using cloth, sheet or fiber consisting ofvarious materials of paper or high polymer as the base material (3), anano horn carrier free to curve, deflect or expand may be realized.Thus, in the nano horn carrier of the invention, the fixing material (2)and base material (3) may be properly selected depending on the purpose,and a wider possibility is realized in application.

The nano horn carrier of the invention may be composed of carbon nanohorn aggregates (1) of any configuration being completely covered withthe fixing material (2), and the surface of the nano horn carrier may becomposed of fixing material (2) only, or as shown in FIGS. 1(d) and (e),part of carbon nano horn aggregates (1) maybe exposed on the surface.Further, characteristically, in the nano horn carrier of the invention,only the tip of carbon nano horn may be projecting from the surface ofthe fixing material (2), for example, as shown in FIG. 1(e). The nanohorn carrier of such projecting tip of carbon nano horn is specificallydescribed below, and it can be manufactured easily as required from thenano horn carrier of the invention of which surface is completelycovered with the fixing material (2). That is, the nano horn carrier ofthe invention can be easily changed in form as required.

The nano horn carrier of the invention as the above may be manufacturedin various methods depending on the purpose. For example, in amanufacturing method of nano horn carrier of the invention, carbon nanohorn aggregates (1) are disposed in a dispersion liquid, the dispersionliquid is supplied on a base material (3), only the dispersion liquid isremoved to dispose carbon nano horn aggregates (1), and a part or all ofthe carbon nano horn aggregates (1) are covered with a fixing material(2) and carried on the fixing material (2).

In the invention, carbon nano horn aggregates (1) manufactured invarious known methods may be used. For example, the carbon nano hornaggregates (1) can be manufactured by a synthesizing method by CO2 laserablation using a catalyst-free graphite target in Ar atmosphere at roomtemperature and 760 Torr.

The dispersion liquid may be, for example, water, carbon disulfide,acid, other inorganic solvent, benzene, toluene, xylene, otherhydrocarbon, methanol, ethanol, other alcohol, ether, its derivative,other organic solvent, or their mixture. For the ease of removal ofdispersion liquid, a volatile dispersion liquid may be used. In thisdispersion liquid, carbon nano horn aggregates (1) are put anddispersed. To disperse carbon nano horn aggregates (1) in the dispersionliquid, for example, they may be agitated by using a stirrer, or lightlyexposed by ultrasonic waves by using an ultrasonic cleaner or the like.

The dispersion liquid in which carbon nano horn aggregates (1) aredispersed is supplied on the base material (3). As mentioned above, thebase material (3) is not specified in material or shape, and anarbitrary material may be used. To supply the dispersion liquid ofcarbon nano horn aggregates (1) on the base material (3), any knownmethod may be employed. Specific examples are casting method, coatingmethod, spin coating method, and spraying method.

By removing the dispersion liquid only, carbon nano horn aggregates (1)are disposed on the base material (3). Herein, by properly selecting theconcentration of carbon nano horn aggregates (1) in the dispersionliquid or supplying method of dispersion liquid, the configuration ofcarbon nano horn aggregates (1) on the nano horn carrier can beadjusted. The dispersion liquid may be removed depending on theproperties of the dispersion liquid. For example, by keeping at a propertemperature, the dispersion liquid may be removed by vaporization. Or byusing the base material (3) made of filter of metal, glass or resin, forexample, by supplying the dispersion liquid on the base material (3)while sucking and filtering, only the dispersion liquid can be removed.

In succession, a part or all of carbon nano horn aggregates (1) disposedon the base material (3) are covered with the fixing material (2), andcarried on the fixing material (2). The fixing material (2) is, asmentioned above, selected from various polymers, organic matter, metalor alloy, and inorganic matter, any material softened by heating at1500° C. or less, or material forming carbides at 1500° C. or less. Thecovering method includes various methods. For example, the fixingmaterial (2) prepared in a liquid form can be applied on the carbon nanohorn aggregates (1) by casting method, coating method or sprayingmethod, then solidified, and a part or all of carbon nano hornaggregates (1) can be covered with the fixing material (2) and carriedon the fixing material (2).

On the carbon nano horn aggregates (1) disposed on the base material(3), the fixing material (2) in, for example, sheet or powder form isput and heated, and the fixing material (2) is fused and supplied incarbon nano horn aggregates (1), and solidified, and thereby a part orall of carbon nano horn aggregates (1) are covered with the fixingmaterial (2) and carried on the fixing material (2).

As a result, a part or all of carbon nano horn aggregates (1) arecarried on the fixing material (2) and fixed on the base material (3),and the nano horn carrier of the invention is manufactured.

In other manufacturing method of nano horn carrier of the invention,carbon nano horn aggregates (1) are dispersed in a dispersion liquidcontaining a fixing material (2), and the dispersion liquid is suppliedon a base material (3), and solidified. That is, the dispersion liquidof carbon nano horn aggregates (1) supplied on the base material (3) issolidified.

In this method of the invention, the dispersion liquid containing thefixing material (2) may be any liquid solidifying gradually along withprogress of reaction, or solidified by heating, cooling, irradiationwith ultraviolet rays or other process. Specifically, preferred examplesare polymethyl methacrylate (PMMA), polyethylene (PE), polyvinylchloride (PVC), thermoplastic resin, thermosetting resin, ultravioletcuring resin, and other polymers being mixed in the dispersion liquid.The method of dispersing carbon nano horn aggregates (1) in thedispersion liquid containing the fixing material (2), and the method ofsupplying this dispersion liquid on the base material (3) may be same asmentioned above. Thus, a part or all of carbon nano horn aggregates (1)are carried on the fixing material (2) and fixed on the base material(3), and the nano horn carrier of the invention is manufactured.

Further, in the method of the invention, by heating the carbon nano hornaggregates (1) disposed on the base material (3) after removing thedispersion liquid at 1200 to 2000° C., the carbon nano horn aggregates(1) are mutually bonded and carried on each other. As a result, the nanohorn carrier having the tip of the carbon nano horn projecting from thesurface of the fixing material (2) can be manufactured.

In this method, a part or all of carbon nano horn aggregates (1) aremutually carried and fixed on the base material (3), and the nano horncarrier of the invention is manufactured.

In a different method of the invention, by using the carbon nano horncarrier manufactured in any preceding method of the invention, byselectively removing a part of the fixing material (2) covering thecarbon nano horn aggregates (1), the tip of the carbon nano horn can beprojected on the surface. This selective removal of the fixing material(2) may be done successively after the process of covering and carryingthe carbon nano horn aggregates (1) with the fixing material (2), or maybe done at any arbitrary timing. In this method of the invention, bydissolving the fixing material (2), for example, by using a solventhaving a dissolving power of the fixing material (2), a part of thefixing material (2) can be removed selectively. Also, for example, byoxygen plasma etching, the fixing material (2) covering the surface andtip of the carbon nano horn may be ashed and removed selectively, or itmay be also removed selectively by heating in oxygen atmosphere.

As a result, the tip of carbon nano horn is projecting from the surfaceof the fixing material (2), and the nano horn carrier of the inventionis manufactured.

In a further manufacturing method of nano horn carrier of the invention,carbon nano horn aggregates (1) are dispersed in a dispersion liquid,this dispersion liquid is supplied on a base material (3) on which afixing material (2) layer is formed preliminarily, only the dispersionliquid is removed to dispose carbon nano horn aggregates (1), and withthe fixing material (2) layer being softened, carbon nano hornaggregates (1) are pressed from above to be carried on the fixingmaterial (2). In this manufacturing method of nano horn carrier,different from the foregoing methods of the invention, the fixingmaterial (2) is preliminarily supplied on the base material (3) to formthe fixing material (2) layer, and the dispersion liquid is suppliedthereon to dispose carbon nano horn aggregates (1).

In this method, the fixing material (2) is preferably made of a materialsoftened by any means. For example, as mentioned above, the fixingmaterial may be a material softened by heating at 1500° C. or less. Morespecifically, examples are indium, gallium, lead, gold, other metal andalloy, oxide and salt having melting point of 1500° C. or less. Suchfixing material is supplied on the base material (3) by an arbitrarymethod, and a fixing material (2) layer is formed. On this fixingmaterial (2) layer, the dispersion liquid of carbon nano horn aggregates(1) is supplied, and removing only the dispersion liquid, the carbonnano horn aggregates (1) are disposed, and then the fixing material (2)layer is softened by heating or other means, for example. In this methodof the invention, the method of dispersing the carbon nano hornaggregates (1) in the dispersion liquid, the method of supplying thedispersion liquid on the base material (3) preliminarily formed thefixing material (2), and the method of removing the dispersion liquidonly maybe same as in the foregoing methods of the invention.

Successively, in the softened state of the fixing material (2) layer,the carbon nano horn aggregates (1) are pressed from above, for example,by a pressing plate having a same surface shape of the base material(3), and a part or all of carbon nano horn aggregates (1) are disposedin the fixing material (2) layer. By solidifying the fixing material(2), the carbon nano horn aggregates (1) are carried on the fixingmaterial (2).

In this method, too, a part or all of carbon nano horn aggregates (1)are carried on the fixing material (2) and fixed on the base material(3), and the nano horn carrier of the invention is manufactured.

According to this method of the invention, further, by adjusting thedegree of pressing, the configuration of carbon nano horn aggregates (1)in the fixing material (2) layer can be controlled. Therefore, bydecreasing the degree of pressing, the carbon nano horn aggregates (1)may be exposed on the surface of the fixing material (2), or the tip ofthe carbon nano horn may be projecting from the surface of the fixingmaterial (2), and fixed on the base material (3), and the nano horncarrier of the invention is manufactured.

In this case, if the carbon nano horn is buried too much in the fixingmaterial (2) layer, as mentioned above, the fixing material can beselectively removed by dissolving the fixing material (2) by solvent, oroxygen plasma etching or heating in oxygen atmosphere. As a result, thetip of the carbon nano horn is projecting from the surface of the fixingmaterial (2), and the nano horn carrier can be manufactured.

On the other hand, in the method of the invention, it may be alsoconsidered to remove the base material (3) of the nano horn carriermanufactured in these methods. By removing the base material (3), thenano horn carrier of the invention not fixed on the base material (3)may be realized. In addition, by removing the base material (3), forexample, only the tip of the carbon nano horn contacting with the basematerial (3) is projected from the surface of the fixing material (2),and the nano horn carrier having only the tip of the carbon nano hornprojecting from the surface of the fixing material (2) may bemanufactured more easily.

To remove the base material (3), for example, depending on thecombination of the base material (3) and fixing material (2), it may berealized easily by peeling the base material (3) and carbon nano hornaggregates (1) partly or wholly carried on the fixing material (2). Whenattempting to remove the base material (3) by peeling, it is preferredto keep smooth the surface of the base material (3). In other method ofremoving the base material (3), for example, the base material (3) canbe removed by dissolving the base material (3) by using a solvent nothaving dissolving power on the fixing material (2) but having dissolvingpower on the base material (3), or depending on the material of the basematerial (3), it may be fused or evaporated by heating. Further, thebase material (3) may be selectively removed by oxygen plasma etching.That is, by using a chemically or thermally stable material for thefixing material (2), and by using a chemically or thermally unstablematerial for the base material (3), the base material (3) can be removedby chemical or thermal technique.

Exemplary examples are shown below together with the accompanyingdrawings, the invention is further described below.

EXAMPLES Example 1

Putting carbon nano horn aggregates in hexane as dispersion liquid,ultrasonic waves were emitted to disperse in hexane. This dispersionliquid was supplied on the crystal surface of NaCl used as base materialin a thickness of about several microns, and hexane was evaporated todispose carbon nano horn aggregates on the base material. The crystalsurface of NaCl was preliminarily polished for later SEM observation. Insuccession, from above the carbon nano horn aggregates, epoxy resin wasapplied as fixing material, and after firming curing of epoxy resin,NaCl was dissolved in water and removed. As a result, a nano horncarrier was obtained in a state of the tip of carbon nano hornprojecting on the surface of epoxy resin.

The surface of the nano horn carrier was observed by scanning electronmicroscope (SEM), and since the carbon nano horn was projected on thesurface, the surface could be observed at high resolution withoutoccurrence of charge-up.

Thus, in the nano horn carrier of the invention, in a state of keepingelectron emission characteristic from the carbon nano horn tip, carbonnano horn aggregates are carried on the fixing material. Therefore, thisnano horn carrier is confirmed to be very useful for use as, forexample, electric field electron emission element of carbon nano hornaggregates.

Since epoxy resin was adhered to part of the projecting carbon nanohorn, the epoxy resin was removed by oxygen plasma etching. The surfaceof this nano horn carrier was more closely observed by atomic forcemicroscope (AFM). An AFM image is shown in FIG. 4. A clear projection oftip of carbon nano horn from the surface of base material was confirmed.

Example 2

On a glass base material, a thin film of indium was deposited in athickness of about 50 nm as fixing material. On the indium thin film ofbase material, hexane dispersion liquid of carbon nano horn aggregateswas dropped, and carbon nano horn aggregates were disposed. The entirebase material was heated to about 120 to 150° C., and the indium thinfilm was softened, and the layer of carbon nano horn aggregates waspressed from above by a flat plate, and the lower part of carbon nanohorn aggregates was fused in indium.

As a result, the lower part of carbon nano horn aggregates was carriedon the indium thin film, and a nano horn carrier fixed on a glass basematerial was obtained.

The invention is not limited to these exemplary examples alone, but itmay be changed and modified variously in detail.

Industrial Applicability

As specifically described herein, the invention presents a nano horncarrier capable of utilizing the tip shape of carbon nano horneffectively and easily, and a method of manufacturing the same.

1-5. (canceled)
 6. A nano horn carrier, wherein two or more carbon nanohorn aggregates are bonded and mutually carried.
 7. The nano horncarrier of claim 6, wherein a part or all of carried carbon nano hornaggregates are fixed on a base material.
 8. The nano horn carrier ofclaim 7, wherein carbon nano horn aggregates are fixed on a basematerial by a fixing material.
 9. The nano horn carrier of claim 7,wherein the base material has an arbitrary shape.
 10. The nano horncarrier of claim 7, wherein the base material is any one of glass,ceramics, metal, alloy, semiconductor, and organic matter.
 11. The nanohorn carrier of claim 6, wherein the shape is variable.
 12. The nanohorn carrier of claim 6, wherein the tip of carbon nano horn isprojecting from the surface of the fixing material.
 13. (canceled)
 14. Amanufacturing method of nano horn carrier which comprises dispersingcarbon nano horn aggregates in a dispersion liquid, supplying thisdispersion liquid on a base material, removing only the dispersionliquid to dispose carbon nano horn aggregates, and covering a part orall of the carbon nano horn aggregates with a fixing member to carry onthe fixing member.
 15. A manufacturing method of nano horn carrier whichcomprises dispersing carbon nano horn aggregates in a dispersion liquid,supplying this dispersion liquid on a base material in which a fixingmaterial layer is formed preliminarily, removing only the dispersionliquid to dispose carbon nano horn aggregates, and pressing the carbonnano horn aggregates from above to the fixing material layer to in asoftened state to carry on the fixing member.
 16. A manufacturing methodof nano horn carrier which comprises dispersing carbon nano hornaggregates in a dispersion liquid, supplying this dispersion liquid on abase material, removing only the dispersion liquid to dispose carbonnano horn aggregates, and heating to 1200 to 2000° C. to bond mutuallythe carbon nano horn aggregates and carry on each other.
 17. Themanufacturing method of nano horn carrier of any one of claims 14 to 16,wherein the base material has an arbitrary shape.
 18. The manufacturingmethod of nano horn carrier of any one of claims 14 to 16, wherein thebase material is any one of glass, ceramics, metal, alloy,semiconductor, and organic matter.
 19. The manufacturing method of nanohorn carrier of any one of claims 14 to 16, wherein the base material iscomposed of a chemically or thermally unstable material.
 20. Themanufacturing method of nano horn carrier of any one of claims 14 to 16,wherein the base material is removed.
 21. The manufacturing method ofnano horn carrier of claim 20, wherein the base material is removed by asolvent.
 22. The manufacturing method of nano horn carrier of claim 20,wherein the base material is removed by heating.
 23. The manufacturingmethod of nano horn carrier of any one of claims 14 to 16, wherein thefixing material is any one of organic polymer, metal, alloy, andinorganic matter.
 24. The manufacturing method of nano horn carrier ofany one of claims 14 to 16, wherein the fixing material is a materialsoftened by heat of 1500 C or less.
 25. The manufacturing method of nanohorn carrier of claim 24, wherein the fixing material is a metal oralloy of which melting point is 1500° C. or less.
 26. The manufacturingmethod of nano horn carrier of any one of claims 14 to 16, wherein thefixing material is a material forming a carbide at 1500 C or less. 27.The manufacturing method of nano horn carrier of any one of claims 14 to16, wherein a part of the fixing material (2) covering the carbon nanohorn aggregates is selectively removed.
 28. The manufacturing method ofnano horn carrier of claim 27, wherein the fixing material isselectively removed by a solvent.
 29. The manufacturing method of nanohorn carrier of claim 27, wherein the fixing material is selectivelyremoved by oxygen plasma etching.
 30. The manufacturing method of nanohorn carrier of claim 27, wherein the fixing material is selectivelyremoved by heating in an oxygen atmosphere.